2-氧代-环己-3-烯基乙酸酯

(cyclohex-2-en-1-ylideneamino)urea

2-acetyl-3-butylcyclohexan-1-one

3-methylsulfanylcyclohex-2-en-1-one

2-phenylselanylcyclohex-2-en-1-one